Progressive Retinal Atrophy

What is Progressive Retinal Atrophy (PRA)?

PRA is an eye condition which affects the retina. More specifically, PRA will have an affect on the photoreceptors which initially impacts the ability to see at night and as the disease progresses, will eventually affect the ability to see during the day as well. In essence, the retina is the tissue located in the eye that posses’ cells called “photoreceptors” that absorb light by means of the eye lens. Once the light is absorbed, these specialized cells (photoreceptors) convert the light into electrical nerve signals which are passed on to the brain (allows us to have vision).

Symptoms

PRA does not typically cause the dog pain. Certain signs of this disorder are more commonly noticed by simply watching your dog’s mannerisms. For instance, your dog may be wary of going down a staircase or a dark hallway. In later stages of the disorder, the dog’s pupils may begin to dilate. In order to test if your dog has this disease, take him into unfamiliar (safe) surroundings and observe his actions. If any of these symptoms are realized, it is recommended that you consult with your vet immediately.

Causes

PRA is known to be an inherited disorder meaning it is passed on from the parents. This disease was first realized Gordan Setters (a dog breed) in the early 1900s.

Treatment and Prevention

Constant research and testing is being done in order to discover which genes cause PRA. To date however, there is no known treatment for this disease and carriers of typically become blind. In addition, the best prevention method is simply not to breed any dogs that have this disorder.

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Progressive Retinal Atrophy